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Autres articles (46)
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Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Soumettre améliorations et plugins supplémentaires
10 avril 2011Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...) -
Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
Sur d’autres sites (4715)
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After video codec copy to mp4 format with ffmpeg,new video has no screen and has just audio
19 juin 2018, par parsaI have an issue.sometimes when I convert video to mp4 with codec copy,my created video in chrome just has audio and it’s display a black screen, and in another browsers like firefox and internet explorer video doesn’t play.
but I check this created video on my server and video displays.
And here is my code in belowffmpeg -i -f mp4 -s 123.mov -codec copy 123.mp4
The Output Of ffprobe 123.mp4 is :
Metadata:major_brand:isom
minor_version :512
compatible_brands:isomiso2mp41
encoder:Lavf57.31.100
Duration: 00:26:58.97, start: 0.000000, bitrate: 1334 kb/s
Stream #0:0(und): Video: mpeg4 (Advanced Simple Profile) (mp4v / 0x7634706D)
,yuv420p, 640x480 [SAR 1:1 DAR 4:3],1200 kb/s, 29.97 fps,29.97 tbr, 30k tbn,29.97 tbc (default)
Metadata:handler_name: VideoHandler
Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, s16p, 12
7 kb/s (default)
Metadata:handler_name: SoundHandler -
Aforge.NET Video Size Decreases When Writing Back Frames to the Video
23 août 2016, par Irfan Babartry { VideoFileReader reader = new VideoFileReader();
VideoFileWriter wrt = new VideoFileWriter();
tot = reader.FrameCount;
wrt.Open("outvid.mp4",reader.Width,reader.Height,reader.FrameRate,VideoCodec.MPEG4);
Bitmap videoFrame = null;
for (int i = 1; i <= tot; i++)
{
videoFrame = reader.ReadVideoFrame();
wrt.WriteVideoFrame(videoFrame );
videoFrame .Dispose();
}
wrt.Close();
reader.Close();
}
}
catch (Exception exc)
{
MessageBox.Show( exc.ToString());
}after writing back the video size and resolution also decrease, what shoud i do to make perfect frame writing back into the video ?
Actually I am reading frame by frame from one video and writing that video frame in another video without any modification,Please suggest me solutions -
FFMPEG scaling video disable viewing it while process is not ended, for video transcoding on the fly
5 juillet 2022, par Lucas FGood day all,


I'm working on a video player with 1080p original video files, and I would like to change their resolution on the fly :


Actually I host all my original video files under a web mp4 1080p format, and I would like to be able to offer 720p, 480p, etc ... qualities.


So I started to look for tutorials about video transcoding on the fly and I found the FFMPEG tool.


I'm actually using the following command to scale videos - to 720p for e.g. :


ffmpeg -i input.mp4 -vf scale=-1:720 output.mp4



The problem is, once FFMPEG starts scaling it, I have to wait the end of the process before being able to play the video. Do you know if there is any parameter for this command to allow playing the video while it's under scaling ?


Or any workaround that can help me doing this ?


Thank you in advance for your help !


EDIT


Now I found how to access readable content while transcoding (by transcoding to fragmented MP4) :


ffmpeg -i input.mp4 -vf scale=-2:720 -movflags +frag_keyframe+separate_moof+omit_tfhd_offset+empty_moov output.mp4



But my problem is when opening the video it comes as an "ended" video of the current transcoded data.


So if video lasts 1min and is half transcoded, I'll see only 30s, it will not load more data, once the rest is transcoded.